perf record -F 99 -g --call-graph dwarf -p 592838 sleep 5
#perf record -g -p 1653465 sleep 3
sleep 3
perf script -i perf.data &> perf.unfold
sleep 2
./FlameGraph/stackcollapse-perf.pl perf.unfold &> perf.folded
sleep 2
./FlameGraph/flamegraph.pl perf.folded > perf.svg
